strstr(3) Library Functions Manual strstr(3)
NAME
strstr - Finds a substring
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <string.h>
char *strstr(
const char *s1,
const char *s2);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
strstr(): ISO C, XPG4, XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the character string being searched. Specifies the substring to be located.
DESCRIPTION
The strstr() function locates the first occurrence in the string pointed to by the s1 parameter of the sequence of bytes in the string
pointed to by the s2 parameter, excluding the terminating null character.
RETURN VALUES
On successful completion, the strstr() function returns a pointer to the located string or a null pointer if the string is not found. When
the s2 parameter points to a string having 0 (zero) length, the strstr() function returns the string pointed to by parameter s1.
RELATED INFORMATION
Functions: string(3), wcsstr(3), wcswcs(3)
Standards: standards(5) delim off
strstr(3)
